Crate stacking is a game. The objective is to stack as many upside-down plastic milk crates as possible and stand on the top. Stackers rest their feet in the handle holes of the milk crates, and the challenge is to place the next crate and transfer footings without losing balance and blowing the stack.

The set up is like indoor rock climbing or top rope climbing in that players are in a harness and are belayed for safety. Crates are tossed to the stacker when the stack is low, and then ferried by a rope on a pulley when the stack is high. When the stack inevitably blows, the stacker is held aloft as the milk crates scatter asunder. It’s fun. Really fun.

Want to try it? Crate Stacking will be going down on the front lawn of Studio One all day at East Bay Mini Maker Faire. Under 18 will need parents present to try. The highest stackers will be invited to a stack-off at 4 PM.